Grumium

data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)

note (category: star names):

Grumium; Genam; Nodus I.

position, motion, parallax:

position (J2000)	RA: 17h 53min 31.7sec	DEC: +56° 52' 22''
position (B1900)	RA: 17h 51min 47.9sec	DEC: +56° 53' 18''
proper motion (J2000)	RA: 0.094 arcsec/a	DEC: 0.08 arcsec/a
radial velocity	-26 km/s note: suspected variable radial velocity
rotational velocity	<17 km/s (uncertain) (variable)
trigonometric parallax	0.035 arcsec
galactic coordinates	longitude: 85.17°	latitude: 30.23°

magnitude

visual magnitude

3.75
(V on UBV Johnson system)

spectral / color information

spectral class	K2-III
B-V-magnitude	1.18
U-B-magnitude	1.21
R-I-magnitude
IR-note	object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978)

double/multiple star system information

separation	316 arcsec
mag difference (of double or brightest multiple)	11.1
note	Worley (1978) update of the IDS

data from SKY2000 - Master Star Catalog (Myers+ 1997)

position, motion, parallax:

magnitude:

visual	3.75 (observed)	source: 25
photovisual	3.9	source: 2

spectral information:

double/multiple star system information:

source of data: 19

separation between brightest and second brightest component	316 arcsec
magnitude difference between brightest and second brightest component	11.9
position angle	290 °

sources:

2	HD and HDE Catalogs
Cannon, A.J., and E.C. Pickering, Harvard Annals, Vols 91-99, 1918-24, Cambridge, Massachusetts: Harvard University; Cannon, A.J., Harvard Annals, Vol. 100, 1925-36, Cambridge, Massachusetts: Harvard University; and Cannon, A.J., and M. Walton Mayall, Harvard Annals, Vol. 112, 1949, Cambridge, Massachusetts: Harvard University
15	FK5, FK5 Extension and FK5 Supplement
Fricke, W., H. Schwan and T. Lederle, "Fifth Fundamental Catalogue (FK5), Part I. The Basic Fundamental Stars," Veroff. Astronomisches Recheninstitut, No. 32, Heidelberg, Germany, 1988, and Fricke, W., H. Schwan, and T.E. Corbin, "Fifth Fundamental Catalogue (FK5), Part II. The FK5 Extension," Veröff. Astronomisches Recheninstitut, No. 33, Heidelberg, Germany, 1991
19	WDS Catalog
Worley, C.E., and G.G. Douglass, Washington Catalog of Visual Double Stars 1996.0, United States Naval Observatory, 1996
25	Bright Star Catalogue, 5th edition
Hoffleit, D. and Warren, W.H. Jr., The Bright Star Catalogue, 5th Revised Edition, Version 2, 1994
96	SAO or HD/HDE Catalog
Reference from Value 1 or Reference from Value 2

data from Smithsonian Astrophysical Observatory Star Catalog (SAO Staff 1966; USNO, ADC 1990)

position and proper motion:

position (B1950)	RA: 17h 52min 39.7sec	DEC: +56° 52' 47.68''	±0.004 arcsec
position (J2000)	RA: 17h 53min 31.713sec	DEC: +56° 52' 21.51''
proper motion B1950 (FK4)	RA: 0.0106 arcsec/a	DEC: 0.078 arcsec/a	±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0.0113 arcsec/a	DEC: 0.079 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	3.9 (accuracy: 2 decimals)
source of visual magnitude data	Taken from the "Henry Draper Catalogue".

spectral information:

spectral class	K0
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)

position and proper motion:

position (J2000)	RA: 17h 53.5min	DEC: +56° 52'
proper motion (J2000)	RA: 0.094 arcsec/a	DEC: 0.08 arcsec/a

double/multiple star system information:

component	year	number of measures	position angle	angular separation	magnitude of 1st component	magnitude of 2nd component	spectral class(es)	discoverer code
-	1963	1	290°	316''	3.75	15.6	K2III	LDS1457

discoverer information:

discoverer code	discoverer	reference
LDS1457	-	-

notes:

note

Xi Dra.

catalogues and names	Grumium, x Dra, NSV 24040, 32 Dra, HR 6688, HD 163588, SAO 30631, BD +56 2033, FK5: 671, WDS 17535+5652
other names	Genam, Nodus I
constellation	Draco